Spiral casing scraper

A scraper and helical technology, applied in the field of helical casing scrapers, can solve the problems of incomplete scraping and poor versatility of spring scrapers, and achieve the effects of good effect, reasonable structure and convenient use.

Inactive Publication Date: 2012-01-25
CNPC XIBU DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a spiral casing scraper, which overcomes the deficiencies of the prior art

Method used

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  • Spiral casing scraper
  • Spiral casing scraper

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Example Embodiment

[0019] The present invention is not limited by the following embodiments, and specific implementations can be determined according to the technical solution and actual conditions of the present invention.

[0020] In the present invention, for ease of description, the description of the relative positional relationship of each component is described in accordance with the layout of Figure 1 of the specification. For example, the positional relationship of top, bottom, left, and right is based on the attachment of the specification. The layout direction of the figure is determined.

[0021] The present invention will be further described below in conjunction with embodiments and drawings:

[0022] As shown in Figure 1, the spiral casing scraper includes an upper joint 1, a body 2, a scraper tube, and a lower joint 3; the inner middle part of the upper joint 1 is fixedly connected with the outer upper end of the body 2; the lower joint 3 The inner middle part is fixedly connected ...

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Abstract

The invention relates to the technical field of casing scrapers, and discloses to a spiral casing scraper. The spiral casing scraper comprises an upper joint, a scraper body, a scraping pipe and a lower joint, wherein the middle part of the inner side of the upper joint is fixedly connected with the upper end of the outer side of the scraper body; the middle part of the inner side of the lower joint is fixedly connected with the lower end of the outer side of the scraper body; and the scraping pipe which can be constricted radially is sleeved on the scraper body between the upper joint and the lower joint, and a scraping gear is arranged on the scraping pipe. The spiral casing scraper disclosed by the invention is reasonable and compact in structure, and easy to use; through the axial elongation of an elastic scraping sheet, the outer diameter of the middle part of the elastic scraping sheet is reduced, therefore, the spiral casing scraper is suitable to be used for scraping casings with different inside diameters, so that the spiral casing scraper is strong in commonality; meanwhile, an annular and downward scraping gear is arranged on the outer side of the middle part of the elastic scraping sheet, therefore, the spiral casing scraper can carry out annular scraping on the inner walls of casings, so that the scraping effect is better.

Description

technical field [0001] The invention relates to the technical field of casing scrapers, and relates to a spiral casing scraper. Background technique [0002] After cementing and removing ash plugs in oil and gas wells, there is usually cement residue on the inner wall of the casing of the ash plug section, which makes the inner wall of the casing in this section not smooth and regular, which will adversely affect the subsequent completion operations; When performing staged fracturing, it is also necessary to scrape and clean the inner wall of the operating casing section, which requires the use of a casing scraper. Common casing scrapers include rubber cylinder scrapers and spring scrapers. Conventional spring scrapers Scrapers generally use several spring-supported scrapers to scrape the inner wall of the casing, but the outer diameter of the scrapers of the same type of spring scraper is fixed, no matter how the spring is compressed, this type of scraper Only the inner di...

Claims

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Application Information

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IPC IPC(8): E21B37/02
Inventor 郭新超张新文翟亚峰杨睿孙澜江
Owner CNPC XIBU DRILLING ENG
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